Is Paid Network on Ethereum?

I've been hearing a lot about Paid Network lately, and I'm curious about its underlying technology. Could you please clarify for me if Paid Network is indeed built on the Ethereum blockchain? I've read some conflicting information online, so I'm looking for a definitive answer. If it is indeed on Ethereum, what are the advantages of this choice? And how does it leverage the unique features of the Ethereum platform to enhance its functionality? I'm also interested in knowing if Paid Network plans to expand its operations to other blockchains in the future. Could you provide some insights into its scalability and interoperability plans?